Patent US4723115A successfully refreshed from Google Patents.
US4723115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power line cord filtering assembly
Assignee: Individual
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Filing: 1985-10-11
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Granted: 1988-02-02
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Expires: 2005-10-11
Abstract
Abstract A power line cord filtering assembly for use with an electrical device and comprising a plug adapted to be connected to electrical mains, a power line cord and filter apparatus arranged in series with said plug, power line cord and electrical device, the filter comprising resistor apparatus, capacitor apparatus and inductor apparatus.
Inventors
- 👤 Robert Apter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:22
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/66; H01R13/719; H01R13/7195
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
127 words
A power line cord filtering assembly for use with an electrical device comprising: a plug adapted to be connected to electrical mains; a power line cord having a first end arranged to be connected to said plug and a second and arranged to be connected to an electrical device, said power line cord having an electromagnetic shield; and filter means arranged in series between said plug and said first end of said power line cord, said filter means comprising a plurality of inductors, each inductor connected in-line with a respective one of said mains, a capacitor shunt-connected across said mains and a resistor shunt-connected across said mains, wherein said power line cord shield is connected to ground only at the second end of said power line cord.
Claim 2
Dependent Claim
127 words
A power line cord filtering assembly for use with an electrical device comprising: a plug adapted to be connected to electrical mains; a power line cord having a first end arranged to be connected to said plug and a second and arranged to be connected to an electrical device, said power line cord having an electromagnetic shield; and filter means arranged in series between said plug and said first end of said power line cord, said filter means comprising a plurality of inductors, each inductor connected in-line with a respective one of said mains, a capacitor shunt-connected across said mains and a resistor shunt-connected across said mains, wherein said power line cord shield is connected to ground only at the second end of said power line cord.
Claim 3
Dependent Claim
52 words
A power line cord filtering assembly for use with an electrical device according to claim 1 and wherein said power line cord comprises phase, neutral and ground leads, and said plurality of inductors comprises a pair of inductors, each inductor connected in-line with a respective one of said phase and neutral leads.
Claim 4
Dependent Claim
26 words
A power line cord filtering assembly for use with an electrical device according to claim 2 and wherein said filter means is lcoated in said plug.
Claim 5
Dependent Claim
26 words
A power line cord filtering assembly for use with an electrical device according to claim 1 and wherein said filter means is located in said plug.
Claim 6
Dependent Claim
23 words
A power line cord filtering assembly according to claim 4 and wherein said shield extends to substantially cover the plug and the filter.
Claim 7
Dependent Claim
37 words
A power line cord filtering assembly according to claim 4 and wherein said shield extends continuously from the power line cord and over the plug and filter so as to eliminate regions where electromagnetic radiation can penetrate.
Claim 8
Dependent Claim
24 words
A power line cord filtering assembly according to claim 4 and wherein the connection between the shield and ground is a low impedance connection.
Claim 9
Dependent Claim
36 words
A power line cord filtering assembly according to claim 4 and wherein a capacitance exists between the shield and a ground lead of said power line cord and has a value of at least 1000 picofarads.
Claim 10
Dependent Claim
124 words
A power line cord filtering assembly for use with an electrical device comprising: a plug adapted to be connected to electrical mains; a power line cord having a first end arranged to be connected to said plug and a second end arranged to be connected to an electrical device, said power line cord having an electromagnetic shield; and a filter means arranged in series between said power line cord and the device, said filter means comprising a plurality of inductors, each inductor connected in-line with a respective one of said mains, a capacitor shunt-connected across said mains and a resistor shunt-connected across said mains, wherein said power line cord shield is connected to ground only at the second end of said power line cord.
Claim 11
Dependent Claim
124 words
A power line cord filtering assembly for use with an electrical device comprising: a plug adapted to be connected to electrical mains; a power line cord having a first end arranged to be connected to said plug and a second end arranged to be connected to an electrical device, said power line cord having an electromagnetic shield; and a filter means arranged in series between said power line cord and the device, said filter means comprising a plurality of inductors, each inductor connected in-line with a respective one of said mains, a capacitor shunt-connected across said mains and a resistor shunt-connected across said mains, wherein said power line cord shield is connected to ground only at the second end of said power line cord.
Claim 12
Dependent Claim
23 words
A power line cord filtering assembly according to claim 9 and wherein said shield extends to substantially cover the plug and the filter.
Claim 13
Dependent Claim
37 words
A power line cord filtering assembly according to claim 9 and wherein said shield extends continuously from the power line cart and over the plug and filter so as to eliminate regions where electromagnetic radiation can penetrate.
Claim 14
Dependent Claim
24 words
A power line cord filtering assembly according to claim 9 and wherein the connection between the shield and ground is a low impedance connection.
Claim 15
Dependent Claim
36 words
A power line cord filtering assembly according to claim 9 and where a capacitance exists between the shield and a ground lead of said power line cord and has a value of at least 1000 picofarads.
References Cited (Backward Citations)
US2186578A
Cited
US3191133A
Cited
DE2042342A1
Cited
US3744128A
Cited
DE2255527A1
Cited
US3778759A
Cited
US4259705A
Cited
DE3148351A1
Cited
US4508414A
Cited
EP0090744A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |